'jiii; I or.i,. ,'1 j.ii. 207 



j|i(' aluniiiiiiin-lftaf \)1<k<;hh (icv'(;loj^(:W al, (lif; liil^oralory \v<-i(' llif; only 

 onoM f.o anj'.f! in KafinfjU'lory rorKlilJon. 'Jliis iiKdliod has h(!(!n 

 ofTirially n<lo|<l(fl l>y liu? Ar-rny a-nd Xavy. 



Tlu; r-,xfjf;ri/nf;;ital sturjy f^f ffif; fori'lil lofiirif^ atifJ fnarjufa'lu/f; of 

 «irj)lanf; j>;'0|>r;]lciH lui^oin l,o yield infrwiiialJon of great vaiue. At 

 ihc, r(>in|)lclif>;i of (lie, sl.udy it will ])(; f/OHsibJc to Hpofify aefuratcly 

 tho HpneioH of WO(;d iui'l i\i<; injiiiufji/hii'in^ eonditionH foi' I he pro- 

 (liietirin r>f the most efheient (HO|,elle/-.-i for the many jcijids <>i nerv icf;. 



A numLei- ()\' u(;W anrl greatly irnpnjvfifj fo/rnulaH fov makirig 

 Wate,rpro<;f glijen for pJyw'(jofi manufjieture were fJeveloped. Oik; 

 of tfies(! for eanr-i/j gJufj Hfiovv'Hah'^nt douhh; the water rcsistane,e of the 

 avjiilal>Je eominereial easein glues and in very resiMtant to rnf^lds. 

 'i'he sperj/ieations of the Arniy anrl Xavy for idl glue and glue ingi-e(ii- 

 0A)iH were prej^arefj at the lahoratory. Mueh of the work r>n gJues 

 was eanied on for tlie, purpoHf; of f>r(!pjuing thent; HpeeificationH. 

 H(:\(-ni\ er,ininereiii.l ernieeniH })>i,v'e n<\(>\il<;(\ tlir; hi,})f>ratory glufis in 

 ];i<*dueti(Mi, Xurnen^UH irnprov emcmtH were (jisr-ov r;;(;d in plywood 

 irumufuetcjie that have also been HueecH-ifuJly adopted in produetion. 



Tlifrre were, ide,ntified '.',(), ^f)'.'> Ham[)leH of wood, itielufling Home 

 foreigfi M'<)<,(\s, anri friiuiy mif-rosfopie, examinationn for deejiy anrj dr;- 

 fccts werr; made, infornuition illuntrating d<!feetH in woo(( was eoJ- 

 leeted. and an illustrated kf^y for distinguishing true mahogany from 

 HO-ealled mahogafdr;H Was f»re,par(!d f(M- prop(;ll(;r insnee.tors. Stuflif;s 

 weie made of the efffict of mf>ulds o/i wagon ano Jiirplane woods, 

 and of thfr effr'.et of st(;am bending on the struetuie, of wood. 



Aetivc work on the valuf; ';f various woods for papej- manufii,' liij(! 

 was diseoiif iriur;d during the War lo devotf; more tirru; to j/ressing war 

 prof^hffiH. IIowe\'(!r, a, rfiliabif; method for dfitermining the tf^aring 

 htrenglh of p}i,|»ei' was dfn'r;!orjefl. A reer^rdjng driusity hydrf^mr^ter 

 was invented whi'h v.ill he oi '•onsidera.hh; us(j in the control of ihf! 

 HO(\}i reeoveiy f>f sijlphii,t<; and sodji j/ulp /nills, aeid making in sulpliite 

 mills, rrdxing in the mannf>ietu/<! of h;dger, hank-note, and otiier 

 fine |)aj>er, and in the eliemi'aJ anri te.xtilr; industries in gf;neial. The 

 vuluf! (if waste herrdcjek ha/'k f/-om pafje;- mills as a source of tannin 

 Was also demonstratrjri. Methods for th(! |>roduetion of Ho<hi anfl sul- 

 phatr; jiulps suitable for nit/ating jirid foj' rendering sulphite pulps 

 huitahlf! for this use were develoj^ed. 



Slif)rlly after the armistice was sigiHid the Salvage Jionrd of \,\\o 

 OrdoJiJiee, I)(;[)jii'tment r(;rpjestefl tlie lahoriifory fo fleterniine flu; 

 suiljihility of se/'f^nrl-eut cottr>n lint(!rs and hull fih(;rs f(jr- fjaper. 

 inanufaetun;. The War Department had on hand at that lim(; a 

 large tonnage of these linters reserved fo;- th(! mariufaelnrc r,f njirr;- 

 rrtllulose, iind VvJis srifiking the best meajis o\' dis()Osing of th(^ surplus. 

 ("oinmr^reial puljn'ng trials and [)a[)er runs marie a.t th(! lahorat(jry 

 Hoon demonstrated that second-eiit lijiters and hull shavings can Ixj 

 pul[)ef| with decidfidly h-ss cherrueal and bleach consum[>fion thnn 

 wof)d, }i,nd that th(!y ar(! (ixeelhwitly adnjited f(jr fhe f)roduelifHi of 

 high-;ijrade bfjok, writing, blotting, lissur;, and other pa|)r;rs. These 

 ex[)erimenfs may well have a far-reaching economic influence on the 

 fuf ure, (jf the paper supply of this country. Arrangements hav(i been 

 rriiule for a [)ractical mill trial where; the valur; of this raw material ean 

 l>e denionsiriited ou a, lonruige f>asis uridf^r average, mill cfmditiofr^. 



The laboratory cooperated with the Chemieal Warfare Service of 

 the Army in gas df;ferise work juid developr^d jui firl ifirjjilly fh n c 

 wood cliaref;al j)ratieally the cfjiDil of coeoniit-shell charcoul. A 



